package cn.wolfcode.service.impl;

import cn.wolfcode.domain.Department;
import cn.wolfcode.mapper.DepartmentMapper;
import cn.wolfcode.qo.PageResult;
import cn.wolfcode.qo.QueryObject;
import cn.wolfcode.service.IDepartmentService;
import com.github.pagehelper.PageHelper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.Collections;
import java.util.List;
@Service
public class DepartmentServiceImpl implements IDepartmentService {
    @Autowired
    private DepartmentMapper departmentMapper;

    @Override
    public void save(Department department) {
        departmentMapper.insert(department);
    }

    @Override
    public void delete(Long id) {
        departmentMapper.deleteByPrimaryKey(id);
    }

    @Override
    public void update(Department department) {
        departmentMapper.updateByPrimaryKey(department);
    }

    @Override
    public Department get(Long id) {

        return departmentMapper.selectByPrimaryKey(id);
    }

    @Override
    public List<Department> listAll() {

        return  departmentMapper.selectAll();
    }

    @Override
    public PageResult<Department> query(QueryObject qo) {
        int count = departmentMapper.selectCount(qo);
        if (count==0){
            return new PageResult<>
                    (qo.getCurrentPage(),qo.getPageSize(), Collections.emptyList(),count);
        }


        int totalPage=count%qo.getPageSize()==0?
                count/qo.getPageSize():count/qo.getPageSize()+1;



        if (qo.getCurrentPage()>totalPage){
            qo.setCurrentPage(totalPage);
        }


        /*PageHelper.offsetPage()*/

        List<Department> departments = departmentMapper.selectForList(qo);
        return new PageResult<>(qo.getCurrentPage(),qo.getPageSize(),departments,count);

    }
}
